should tube
Regular verb: tube - tubed- tubed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd tube
you'd tube
he'd tube
we'd tube
you'd tube
they'd tube 	I'd be tubing
you'd be tubing
he'd be tubing
we'd be tubing
you'd be tubing
they'd be tubing	I should've tubed
you should've tubed
he should've tubed
we should've tubed
you should've tubed
they should've tubed	I should've been tubing
you should've been tubing
he should've been tubing
we should've been tubing
you should've been tubing
they should've been tubing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't tube
you shouldn't tube
he shouldn't tube
we shouldn't tube
you shouldn't tube
they shouldn't tube 	I shouldn't be tubing
you shouldn't be tubing
he shouldn't be tubing
we shouldn't be tubing
you shouldn't be tubing
they shouldn't be tubing	I shouldn't have tubed
you shouldn't have tubed
he shouldn't have tubed
we shouldn't have tubed
you shouldn't have tubed
they shouldn't have tubed	I shouldn't have been tubing
you shouldn't have been tubing
he shouldn't have been tubing
we shouldn't have been tubing
you shouldn't have been tubing
they shouldn't have been tubing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tube?
should you tube?
should he tube?
should we tube?
should you tube?
should they tube? 	should I be tubing?
should you be tubing?
should he be tubing?
should we be tubing?
should you be tubing?
should they be tubing? 	should I have tubed?
should you have tubed?
should he have tubed?
should we have tubed?
should you have tubed?
should they have tubed? 	should I have been tubing?
should you have been tubing?
should he have been tubing?
should we have been tubing?
should you have been tubing?
should they have been tubing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I tube?
shouldn't you tube?
shouldn't he tube?
shouldn't we tube?
shouldn't you tube?
shouldn't they tube? 	shouldn't I be tubing?
shouldn't you be tubing?
shouldn't he be tubing?
shouldn't we be tubing?
shouldn't you be tubing?
shouldn't they be tubing? 	shouldn't I have tubed?
shouldn't you have tubed?
shouldn't he have tubed?
shouldn't we have tubed?
shouldn't you have tubed?
shouldn't they have tubed? 	shouldn't I have been tubing?
shouldn't you have been tubing?
shouldn't he have been tubing?
shouldn't we have been tubing?
shouldn't you have been tubing?
shouldn't they have been tubing?